Definisi : adj dwi, dua; (science, engin) dual, duaan: a patient with a ~ personality, pesakit yg mempunyai dua personaliti; the machine has a ~ function, mesin itu mempunyai dwifungsi; ~ nationality, dua kerakyatan; ~ host virus, virus perumah duaan; ~ pressure cycle, kitar tekanan duaan. (Kamus Inggeris-Melayu Dewan)